code: def run(self):
      self.evaluator = Evaluator(self.opt)
      return self.evaluator.eval_model()
  
imports: from parlai.core.params import ParlaiParser, print_announcements
  from parlai.core.agents import create_agent
  from parlai.core.logs import TensorboardLogger
  from parlai.core.metrics import aggregate_named_reports, aggregate_unnamed_reports, Metric
  from parlai.core.opt import Opt
  from parlai.core.worlds import create_task
  from parlai.utils.misc import TimeLogger, nice_report
  from parlai.utils.world_logging import WorldLogger
  from parlai.core.script import ParlaiScript, register_script
  from parlai.utils.io import PathManager
  import parlai.utils.logging
  import json
  import os
  import random
  from parlai.utils.distributed import is_primary_worker, all_gather_list, is_distributed, get_rank
label_desc: Use image node_id 2 for calling the EvalModel obj's underlying member method code with example usage: obj.run() and returns: self